Numbers to Contacts. Rhyme or Reason?

Trying to find some rhyme or reason here. I was able to export a Numbers spreadsheet to CSV and then import that into Contacts. On the Mac (a 2012 mini running Mojave), it went very smoothly. All of the records in the spreadsheet transferred over as expected. I was able to import all of them into a specific group created just for this import. However, when I open Contacts on a new iPad Pro running iPadOS 15.1, I can see the group but only about 1/2 of the contacts appear. There are 258 on the Mac in Contacts but only 122 in the same group on the iPad. And there seems to be no rhyme or reason to which ones are not displaying on the iPad. It really appears to just be random.

It would be great to be able to work with this same group of contacts on the iPad as well as on the Mac but as of now, that seems to not be possible. Would love to get some ideas as to why or what i can do about it.